Nginx Directives

server {
  listen 80;
  server_name example.com;

  location / {
    proxy_pass http://app:3000;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }
}

server {
  listen 443 ssl http2;
  server_name example.com;

  ssl_certificate     /etc/ssl/certs/fullchain.pem;
  ssl_certificate_key /etc/ssl/private/privkey.pem;
}

proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=app_cache:10m max_size=1g;

location /api/ {
  proxy_cache app_cache;
  proxy_cache_valid 200 1m;
  add_header X-Cache-Status $upstream_cache_status;
}

limit_req_zone $binary_remote_addr zone=perip:10m rate=10r/s;

location / {
  limit_req zone=perip burst=20 nodelay;
}

gzip on;
gzip_types text/plain text/css application/json application/javascript;

# Brotli (requires module)
brotli on;
brotli_types text/plain text/css application/json application/javascript;

location /socket/ {
  proxy_pass http://app:3000;
  proxy_http_version 1.1;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection "upgrade";
}

upstream app_backend {
  server 10.0.0.10:3000 max_fails=3 fail_timeout=30s;
  server 10.0.0.11:3000 max_fails=3 fail_timeout=30s;
}

location / {
  proxy_pass http://app_backend;
}

add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
add_header Content-Security-Policy "default-src 'self'" always;

add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;

client_max_body_size 10m;
client_body_timeout 10s;